Means for locking electric sockets to fixtures.



x 11. HUBBBLL. MEANS POE LOOKING ELECTRIC SOCKETS T0 FIXTURES.

APPLIQATION FILED MAR. 16, 1907.

900,854; Patented Oct. 13,1908.

, INVENTOH I i I HARVEYHUBBELIJI OF 'BRIDGEIOR'I, CONNECTICUT.

MEANS FOR LOCKING-EL EC'IRIC SOCIQETS TO FIXTURES.

To all whom it may concern:

Be it known that I, HARVEY HUBBELL, a citizen of the United States, residing at Bridgeport, countyv of Fairfield, State of Connecticut, have invented a new and useful.

Means for Locking Electric Sockets to Fire tures, of which the following is a specification. v

This invention has for its object to provide a simple and inexpensive means for attaching electric sockets to fixtures in proper relative rotative positions which shall avoid the use of external screws and the various objections to old forms of attachment, shall be quick and certain in use and will greatly im rove' the appearanceof the connection.

l l ith this end in view I have devised the novel connection, of which the following description in connection with the accompanying drawing is a specification, reference characters being used to indicate the several parts.

Figure 1 is a view partly in elevation and partly in section, illustrating my novel mode of attaching an electric lamp-socket to a nipple; Fig. 2 a section of the socket detached Fi 3 a plan view of one fornrof the clamping bushing, detached; Fig. 4 an edge view corresponding with Fig. 3; Fig. 5 a plan view of avariant form ushing, detached and Fig. 6 is a sectiop on the line 6-t3 in '5. I 4

For convenience in illustration I have shown the cap only of an electric lampsfocket shellwhich is indicated by 10.

11 denotes the tube or arm of an electric fixture which is provided with a nipple '12 having a male thread 13. At the base of the socket shell is a recess 14 which receives a clampii ng bushing indicated as a whole by 15. Wings indicated by 16 and 17, which lie parallel with each other and slightly separated and which may or may not be made integral as preferred.

In Figs. lto 4 inclusive, the parts or wings of the clamping bushing are shown as blankedv out from sheet metal and connected together by folded p rallel with each other by bending the neo The outer wing 17 of the clamping bushing is preferably' provided with one or more angular faces 19 upon its edge and it,

against rotation-1,111 recess- 14 bYfiIOSlilgiihQ metal of the cap against the angular faces.

proper relative rotativepositions, is, held Specification oi Letters Patent.-

Application filed March 16, 1907. Serial No. 362,630.

,of clamping his bushing comprises .two parts or a neck 18, the wings being then Patented Oct. 13, 1908 central opening 20; through both wingsthereof which is provided with a female thread to receive the thread upon the nipple. On the opposite side of the central dpening from the neck, both wings of the clamping bushing are which passes freely through the upper wing. Owing to the fact that the metal of the cap is closed against the angular faces of the outer part 1?,while the inner part 16 of the bushing is not directly connected in any way to the metal of the cap, I have provided an exceedingly simple and cheap structure Whereby the bushing isfirmly and permanently connected to the sheet metal cap, while the inner part of the'bushing is left free to yield when the screw 22 is turned in.

In the form illustrated in Figs. 5 and 6, parts or wings 16 and 17 are not formed in-' .tegral, the neck being dispensed with, a washer 23 being interposed between the wings on one side of the central openin and the wings being connected together y a rivet24 passing through both wings and through the-washer. p As is well known, .the fixture which supfact usually, mounted so that it cannot be conveniently turned on its axis. And the shell should project in a direction which Will render it most convenient of access. With locked there by, tightening screw 22 which locking the parts securely together'.= may be readily detached, 'howeve'r,at time b slightly loosening'screw 22.

say

Claim: p 1. A'sfoc'net shell having a ecu permanently secured thereto an comprising W c u hz g in erna receive a t readed end of. a

ports an electric lamp is frequently, and in shall project. i.

' When the'parts are-to beconnected,screw 22 is turned backward-slightly, as in Fig. 2', and the thread of the nipple is turned int'o'jthe clamping: bushing, as in Fig. 1. Whenthe; socket is set in the desired position it'is.

Having thus described. I i

" [device I The clamping bushing is provided with a provided with holes 21, the hole in the lower wing being tapped to. receive a screw 22' usual switch key projecting from the socket my invention, the socket shell can be 'conlib loo: moves the-parts of thelbushingtowardieaeh, other and causes the threadjo'f the bushing I to clamp the thread upon the nipple, the%%by. I f

Wings of the bushin bein slightly separated,

shell, and a screw having its head inside the shell and connecting the two Wings of the bushing Whereby'the frictional engagement of the threads of the coupling and fixture be varied. I I

' 2. A socket shell having a coupling device permanently secured thereto and com rising a two-Wing bushing internally threaded to 'receive a threaded end of a fixture, the two Wings of the bushing being slightly separated,

one Wing having angular faces over which the metal of the shell is closed, the other 15 Wing being circular and being mounted 1 rec inside of'said shell, and a screw having its head inside the shell and connecting the two Wings of the bushing whereby the frictional engagement of the threads oi the coupling 20 and fixture may be varied.

In testimony whereof Iallix my signature, in presence of two witnesses.

'IARVEY HUBBELL. Witnesses:

A. M. \Voos'rnn, S. lV. ATHERLON. 

